1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c13ac2810f6d42298be9d7979d97227d38268177d6d6b784eb6cdab19343213. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/97775ec6-e818-4c9a-9b5c-db1a92c8a54e.json and https://artists.proofprofile.net/proofs/artist/97775ec6-e818-4c9a-9b5c-db1a92c8a54e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Be Thou My Vision (Arr. P. Stopford for Choir, Flute & Piano)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0721cefe43daa3ca980dbbae926c185ffa0a9992aa46e4281e73ab1dc9a9a276. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBXUX0882601.
Londonderry Air "O Christ the Same Through All Our Story's Pages"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7465e842a95e15e87c858413aca033dda059c78b875ba85e6d88489dcd1125a4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBXUX0882616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c47079cc5730665b7d9c05a1a68abd8900a2893897beae8f90abcd6afad061. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBXUX0882619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558112f31b178f5862951ed23970b39c1cb24d37e835b2e13aeed5e653e4fc28. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBXUX0882622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ecc2b305398b42541cdd841ba5873730cef834447a21ce0b8c56cb39c9a20c. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBXUX0882621.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
The Complete New English Hymnal, Vol. 22
Laudes Domini "When Morning Gilds the Skies"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa30bcd5722e03c4d8815b4c40578caa31a944a4701f12e5377d98767583828. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBXUX0872201.
St Raphael "Praise to God Whose Word Was Spoken"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0b226be787c9f233f08237bdbca251a73e6a300400723bb3d41485206eb71b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBXUX0872202.
Lasst uns erfreuen "Ye Watchers and Ye Holy Ones" (Arr. R. Vaughan Williams for Choir & Organ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe894473818cc7cbcaea122e10abb85bbe3dec67cbc0303904539c6b227718749. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBXUX0872219.
Little Cornard "Hills of the North, Rejoice"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd778b2b77486f2c9f254a809b7e5525d9c7c181fe32ec3c01325ffe24bceff82. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBXUX0872222.
Austria "Praise the Lord! Ye Heavens, Adore Him" (After Haydn)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9d8be195d713512147b3ddc3ab3430918c1f9027f8ced461b91378b1e75273. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBXUX0872225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198d5909d608e1af3f23ce21e8e8c82ef438e03501738f79d79cff6f813edea5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBXUX0872226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e7eff1cd91f750d1570264984fdfa8d86073a7354accff6450f17a4c3ef758. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBXUX0872205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038498b79c409b6baaecb727ee3520f8b718a8520271ba565023fa8328e2a2a9. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBXUX0872210.
Christus, der ist mein Leben "My Soul There Is a Country"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0bb4817fbb898ca1def5a09b30aa23d9104905318b16ecfb07d7a4d4a73818. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBXUX0872220.
St. Botolph "Jesus, the Very Thought of Thee"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61dfae080759125739923e4194cc000e9dceeaca1bc5629b955ae74a9b814606. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBXUX0872224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bab85747e5a36239ed463e08bc505e587d0b62a0593036844da69f2948bd1e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBC3S2129220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a9a0d2159095c2d27ca60bc9c3c64e365583543139672a9e9546763e4d4225. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCEU1678104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9becaf6cfb6125c569d225cc8a43a1aeec81a2f7232563ba2c22e4650d9f56d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCEU1678105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1947b702401405f482d0b6d20f3f23fd15e0ffab9ce7b25b0cfdfa16746c4a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCEU1678109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56c145b7db126a6e1c263d74c2b3b61a07ce3ece2ccce9fee2e94ea1c12bd0b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCEU1459036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df93444e59ad14aec755974a0a51cf3c3f64d7ea714ae2c08bff55da077f94a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCEU1678133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b3ff208496138ecf13d3ce157dd434846ccae920131730220b3e2c5fc6c18d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCEU1678137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8127abccc14cf1dd8674abe4c5cf0a661b1d087943b958400b4860859f99214c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCEU1459031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330f4698e6ed8e01b47554a229364c9f2287b963844552c6c2908e41f23cb10d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCEU1459022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a39c4b313d7b9ace06c73ac791fec5fa65f1bf0f40c80138dbd7d56c9e9047. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBCEU1564941.
Wilby: An English Passion According to Saint Matthew
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1090f439e7749ffca03a73cedd9f402c1fed226b8cad71ae831222d2ccfd68b1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBC3S2129214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d78862af4e04d5432af5215c554f8762a343b6b246eed5b75415ff502cabb5. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBC3S2129204.
Peace I Leave with You - A Sequence of Music for the Holy Eucharist
The Knaresborough Service: II. Nunc dimittis